The original lab text is as follows, the video shows a slightly modified version.

Task 1

Configure hostnames and IP addressing on all routers as illustrated in the network topology.

Task 2

Configure EIGRP for AS 1 as illustrated in the topology. However, do NOT advertise the 150.x.x.x subnets on any router via EIGRP.

Task 3

Configure routers R2 and R4 to as EIGRP stub routers. These routers should advertise their 150.x.x.x/24 subnets as Internal EIGRP routes to R1.

Task 4

Configure R1 so that it advertises ONLY a default route to both R2 and R4 as an External EIGRP route. Next, verify your configuration using the appropriate commands. Additionally, also verify that R2 and R4 can ping each others’ 150.x.x.x/24 subnets from their LAN interfaces, as well as the 150.1.1.0/24 subnet on R1s LAN.

Task 5

Configure EIGRP authentication for AS 1 so that all the routers use the password CCNP-2010; however, after 15 minutes, the routers should stop using this password and begin using the password CCNP-2011. The password CCNP-2011 should be used by all routers indefinitely. Verify your configuration using the appropriate commands.

Any feedback greatly appreciated. This is my first screencast going over how the EIGRP network command matches the interfaces that you want to add into the EIGRP process. It’s also how ACL matches packets based in IP. At its core, it has to do with the wildcard mask and matching binary configurations whereas wildcard mask is a 0.